[Geoinformational model of the carbon reserve of the Russian tundra zone]. / Geoinformatsionnaia model' biudzheta ugleroda tundrovoi zony Rossii.

ABSTRACT

We present a summary of our own gas measurement data on biogenic fluxes of CO2 in various ecosystems of the Russian tundra zone, using seasonal and geographical extrapolations based on mathematical simulation modeling. The model follows construction principles of geoinformational systems and consists of (1) a computer map of tundra landscape boundaries; (2) a meterological database; (3) a model of changes of the phytomass; and (4) the actual model of carbon fluxes. The model, which uses a 10-day step, allows estimates of regional and landscape-associated macroscopic carbon fluxes and predicts the response of the tundras to climatic changes. The data obtained are in good agreement with independently obtained estimates of the major characteristics of tundra carbon balance.